Which perm lasts from 3 to 6 months? (depending on the hair type)

Which perm lasts from 3 to 6 months? (depending on the hair type)

• A. The heat perm
• B. The cold perm
• C. The digital perm
• D. The alkaline perm

Answer: (A)

Understanding how long a perm lasts comes from looking at how the curl is created and how the bonds in hair are reformed and set. A heat perm uses applied heat during processing to drive the chemical reactions that break and then re-form the disulfide bonds more completely. When those bonds re-form in the new curved shape and the neutralizer fixes the curl, the result tends to hold up longer. Because hair grows from the scalp, the visible effect lasts about 3 to 6 months for many hair types, with the exact duration depending on the hair’s texture and growth rate. The other methods use different formulations and heat levels, which can produce curls with different lasting power, but heat-enabled perms are commonly associated with a stronger hold and longer-lasting results.

Understanding how long a perm lasts comes from looking at how the curl is created and how the bonds in hair are reformed and set. A heat perm uses applied heat during processing to drive the chemical reactions that break and then re-form the disulfide bonds more completely. When those bonds re-form in the new curved shape and the neutralizer fixes the curl, the result tends to hold up longer. Because hair grows from the scalp, the visible effect lasts about 3 to 6 months for many hair types, with the exact duration depending on the hair’s texture and growth rate. The other methods use different formulations and heat levels, which can produce curls with different lasting power, but heat-enabled perms are commonly associated with a stronger hold and longer-lasting results.